And . . . . you're wrong. See, the problem is that you're approaching it from a very biased perspective, which is actually what is keeping more women from succeeding in traditionally male dominated fields (STEM and leadership). Not just because of glass ceilings, but because most women don't want to be seen as too competitive, so hold themselves back.

As for heavier labor, well yes, men will always dominate those fields due to obvious physical advantages. But those aren't the careers running the world.

Ok, physical labor has been conceded. Thank you.

Why would women be as capable as men in scientific reasoning or leadership? These have always been male-dominated areas. Look back over all of recorded history. That's over 6,000 years for those counting at home. How many women have invented something extraordinary or made a scientific breakthrough? How many have commanded the respect of their peers?

The assumed state of things is not that all genders are equal. Since the beginning of us being human, I believe there were gender roles. This lead to differing evolution between the sexes.